Exercise barbell



FIG. 1 is a perspective view of the exercise barbell showing my new design.

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image thereof.

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a side elevational view thereof; the opposite side being a mirror image thereof. 

CLAIM The ornamental design for an exercise barbell, as shown and described. 